Imaging apparatus, flicker detection method, and flicker detection program

An imaging apparatus comprising:

• an imaging element;
• an imaging element driving unit that directs the imaging element to alternately perform imaging operations at a first frame rate and a second frame rate being different from the first frame rate;
• and
• a flicker detection unit that detects whether a first flicker of a light source with a first frequency is present and whether a second flicker of a light source with a second frequency is present, based on a captured image signal obtained by an imaging operation at the first frame rate, a captured image signal obtained by an imaging operation at the second frame rate following the imaging operation at the first frame rate, and a captured image signal obtained by an imaging operation at the first frame rate or the second frame rate which is different from the imaging operation at the first frame rate and the imaging operation at the second frame rate,
• wherein the first frame rate is a value obtained by dividing the first frequency by a natural number, and
• the second frame rate is a value other than a value obtainable by dividing the first frequency by a natural number.

A computer readable medium storing a flicker detection program that causes a computer to perform:

• directing an imaging element to alternately perform imaging operations at a first frame rate and a second frame rate being different from the first frame rate;
• and
• detecting whether a first flicker of a light source with a first frequency is present and whether a second flicker of a light source with a second frequency is present, based on three captured image signals, that is, a captured image signal obtained by an imaging operation at the first frame rate, a captured image signal obtained by an imaging operation at the second frame rate following the imaging operation at the first frame rate, and a captured image signal obtained by an imaging operation at the first frame rate or the second frame rate which is different from the imaging operation at the first frame rate and the imaging operation at the second frame rate,
• wherein the first frame rate is a value obtained by dividing the second frequency by a natural number, and
• the second frame rate is a value other than a value obtainable by dividing the second frequency by a natural number.

A computer readable medium storing a flicker detection program that causes a computer to perform:

• directing an imaging element to alternately perform imaging operations at a first frame rate and a second frame rate being different from the first frame rate;
• and
• detecting whether a first flicker of a light source with a first frequency is present and whether a second flicker of a light source with a second frequency is present, based on three captured image signals, that is, a captured image signal obtained by an imaging operation at the first frame rate, a captured image signal obtained by an imaging operation at the second frame rate following the imaging operation at the first frame rate, and a captured image signal obtained by an imaging operation at the first frame rate or the second frame rate which is different from the imaging operation at the first frame rate and the imaging operation at the second frame rate,
• wherein the first frame rate is a value obtained by dividing the first frequency by a natural number, and
• the second frame rate is a value other than a value obtainable by dividing the first frequency by a natural number.